Documentation Software

xDocumentor will currently parse javadoc comments in php(lang x) code. xdocumentor is very fast and documentation can be updated on the fly as code is committed into cvs or subversion. xDocumentor uses PHP's built in code parser and mysql backend.

YADS is a clone of the documentation system that PHP uses for its API.
Since PHP doesn't have it in a nice package for everyone and their twin to download and install (at least none that I can see), I figured I will just recreate it.

iDoc is a easy, web-based document manager. You can add,edit,print,delete docs and catalogs. It's multilangual and multiuser environment. You can share your docs/catalog or keep them private. Data is stored in MySQL or PostgreSQL database.

Docmint is a multilingual CMS for online manuals like the PHP.net website. It features comments, search, templated layout, code highlighting, localizable admin and public interface, file upload, UTF-8 support, import from HTML, and a WYSIWYSG editor.